The rider, still alive, was found by firefighters in a ditch off the boulevard, west of Railroad Avenue. The rider was taken to Marin General Hospital and pronounced dead.

The bicyclist, whose name wasn’t released Tuesday morning, had been westbound on the rural route. Drake also was westbound and veered onto the right shoulder, striking the rider, CHP Officer Andrew Barclay said.

Officers determined Drake was intoxicated and arrested her on suspicion of DUI and vehicular manslaughter.

Check back for updates.

You can reach Staff Writer Randi Rossmann at 521-5412 or randi.rossmann@pressdemocrat.com.